MACROMEDIA FLASH 8-FLASH LITE 2.X ACTIONSCRIPT LANGUAGE - Boolean Function

Global Functions 39
Usage 3: The following example creates an array with three defined elements:
var myArray:Array = Array("firstElement", "secondElement", "thirdElement");
trace (myArray); // traces firstElement,secondElement,thirdElement
Unlike the Array class constructor, the Array() function does not use the
keyword new .
See also
Array
Boolean function
Boolean(expression:Object) : Boolean
Converts the parameter expression to a Boolean value and returns a value as described in the
following list:
■ If expression is a Boolean value, the return value is expression.
■ If expression is a number, the return value is true if the number is not zero; otherwise
the return value is
false.
If
expression is a string, the return value is as follows:
■ In files published for Flash Player 6 or earlier, the string is first converted to a number; the
value is
true if the number is not zero, false otherwise.
■ In files published for Flash Player 7 or later, the result is true if the string has a length
greater than zero; the value is
false for an empty string.
If
expression is a string, the result is true if the string has a length greater than zero; the
value is
false for an empty string.
■ If expression is undefined or NaN (not a number), the return value is false.
■ If expression is a movie clip or an object, the return value is true.
Unlike the Boolean class constructor, the Boolean() function does not use the keyword new .
Moreover, the Boolean class constructor initializes a Boolean object to false if no parameter is
specified, while the Boolean() function returns undefined if no parameter is specified.
Availability: ActionScript 1.0; Flash Lite 2.0 - Behavior changed in Flash Player 7.
Parameters
expression:Object - An expression to convert to a Boolean value.
Returns
Boolean - A Boolean value.